87 lines
2.3 KiB
Nix
87 lines
2.3 KiB
Nix
|
{ config, lib, pkgs, ... }:
|
||
|
|
|
||
|
|
with lib;
|
||
|
|
|
||
|
|
let
|
||
|
|
cfg = config.services.dnscache;
|
||
|
|
|
||
|
|
dnscache-root = pkgs.runCommand "dnscache-root" {} ''
|
||
|
|
mkdir -p $out/{servers,ip}
|
||
|
|
|
||
|
|
${concatMapStrings (ip: ''
|
||
|
|
echo > "$out/ip/"${lib.escapeShellArg ip}
|
||
|
|
'') cfg.clientIps}
|
||
|
|
|
||
|
|
${concatStrings (mapAttrsToList (host: ips: ''
|
||
|
|
${concatMapStrings (ip: ''
|
||
|
|
echo ${lib.escapeShellArg ip} > "$out/servers/"${lib.escapeShellArg host}
|
||
|
|
'') ips}
|
||
|
|
'') cfg.domainServers)}
|
||
|
|
|
||
|
|
# djbdns contains an outdated list of root servers;
|
||
|
|
# if one was not provided in config, provide a current list
|
||
|
|
if [ ! -e servers/@ ]; then
|
||
|
|
awk '/^.?.ROOT-SERVERS.NET/ { print $4 }' ${pkgs.dns-root-data}/root.hints > $out/servers/@
|
||
|
|
fi
|
||
|
|
'';
|
||
|
|
|
||
|
|
in {
|
||
|
|
|
||
|
|
###### interface
|
||
|
|
|
||
|
|
options = {
|
||
|
|
services.dnscache = {
|
||
|
|
enable = mkOption {
|
||
|
|
default = false;
|
||
|
|
type = types.bool;
|
||
|
|
description = "Whether to run the dnscache caching dns server";
|
||
|
|
};
|
||
|
|
|
||
|
|
ip = mkOption {
|
||
|
|
default = "0.0.0.0";
|
||
|
|
type = types.str;
|
||
|
|
description = "IP address on which to listen for connections";
|
||
|
|
};
|
||
|
|
|
||
|
|
clientIps = mkOption {
|
||
|
|
default = [ "127.0.0.1" ];
|
||
|
|
type = types.listOf types.str;
|
||
|
|
description = "client IP addresses (or prefixes) from which to accept connections";
|
||
|
|
example = ["192.168" "172.23.75.82"];
|
||
|
|
};
|
||
|
|
|
||
|
|
domainServers = mkOption {
|
||
|
|
default = { };
|
||
|
|
type = types.attrsOf (types.listOf types.str);
|
||
|
|
description = "table of {hostname: server} pairs to use as authoritative servers for hosts (and subhosts)";
|
||
|
|
example = {
|
||
|
|
"example.com" = ["8.8.8.8" "8.8.4.4"];
|
||
|
|
};
|
||
|
|
};
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
###### implementation
|
||
|
|
|
||
|
|
config = mkIf config.services.dnscache.enable {
|
||
|
|
environment.systemPackages = [ pkgs.djbdns ];
|
||
|
|
users.extraUsers.dnscache = {};
|
||
|
|
|
||
|
|
systemd.services.dnscache = {
|
||
|
|
description = "djbdns dnscache server";
|
||
|
|
wantedBy = [ "multi-user.target" ];
|
||
|
|
path = with pkgs; [ bash daemontools djbdns ];
|
||
|
|
preStart = ''
|
||
|
|
rm -rf /var/lib/dnscache
|
||
|
|
dnscache-conf dnscache dnscache /var/lib/dnscache ${config.services.dnscache.ip}
|
||
|
|
rm -rf /var/lib/dnscache/root
|
||
|
|
ln -sf ${dnscache-root} /var/lib/dnscache/root
|
||
|
|
'';
|
||
|
|
script = ''
|
||
|
|
cd /var/lib/dnscache/
|
||
|
|
exec ./run
|
||
|
|
'';
|
||
|
|
};
|
||
|
|
};
|
||
|
|
}
|